MIVI Technical Manual
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3. Operation and calibration
3.1 MIVI utilization
Be sure that the offset in the air has been performed before introducing the fluid in the process.
Refer to the electronics manual for display, advanced data processing and output features.
3.2 Periodic checking
Conformity to regulations relative to Quality Insurance implicates a periodic control of the meas-
uring equipment used in the manufacturing operations, taking in consideration (or correct-
ing) their drift in time.
It is proved that this equipment drift is negligible. However, it is good to check their aspect and
their response once a year, at the same time as the other process equipment. A quick control
is possible from time to time, if the sensor active part is in air, or immersed in a cleaning or
rinsing solution. As long as these values stay similar, we can say that the sensor operation is
right among its whole range (if no intermediate re-programming occurred).
3.2.1
Modification of the previous calibration
The paired transducer has been programmed in order to perfectly answer to the customer’s needs.
These settings are noted in the factory “specific notes and manufacturing parameters” pages
that are delivered with the documentation. The factory calibration is performed with certified
viscosity standards (Newtonian mineral oils). In normal conditions, there is almost no drift of
the calibration. Nevertheless, the need for calibration update isn’t abnormal.
At first, be sure that the modification is necessary, and not consecutive of a non-coherent compar-
ative information (different measuring conditions, bad standards, inaccurate or wrong labor-
atory measurements …). The initial calibration parameters are protected and can only be
modified at SOFRASER. For any modification, check in the electronic manual if this operation
is allowed or contact your distributor.
Calibration update at SOFRASER workshop is the first solution. Please contact your distributor or
SOFRASER after sales team.
Calibration can be checked and updated in process conditions. Run your process in steady state
conditions, record viscometer reading, take a sample and determine its viscosity with your
reference method at the process temperature, compare and, if necessary, adjust the viscom-
eter’s response thanks to the correlation / correction feature of the electronics.
Third method is to control the response by using the on lab stand method described in SOFRASER
technical procedure (Ref.: 307-308) and Newtonian mineral type oils (see APPENDIX D).
Similar control and adjustment can be performed for the optional incorporated temperature
probe thanks to the Pt100 calibration features (see electronics manual).
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